Let’s see how to build a “Two way Transitive Trust” . You need to have a proper DNS resolution working two way.
There are different types of trusts, “Two way Transitive Trust“ is the most used and less complicated trust where both the organizations will have all the permissions over the organizations. It doesn’t fit all the scenarios. But most of them.
This will be the Initial Step if your going to do a cross forest migration between two messaging environments or migrate your Active Directory into single domain or coexist to share permissions between two forest.
Source domain – sourceazure365pro.com
Target Domain – targetazure365pro.com
Open Active Directory Domains and Trusts.
Start – Administrative Tools – Active Directory Domains and Trusts
Click on “New Trust”
Am Typing the “Netbios” or root the domain name name of the Target forest
Click on Forest Trust
Click on “Two-way” as we are going to setup – Two way Transitive Trust
Click on “Both this domain and the Specified domain”
Type the Target domain Administrator Credentials
Click on “Forest-Wide Authentication”
Outgoing Trust Authentication Level – Local Forest
Outgoing Trust Authentication Level – Specified Forest
In the confirm outgoing trust, choose Yes, Confirm the outgoing trust option. Click Next.
In the confirm incoming trust, choose Yes, Confirm the incoming trust option. Click Next.
The trust relationship has been created successfully in this domain controller. Click Finish.
You can now view the trust relationship from the trusts tab as shown above
You can test by sharing the folder from source domain to target domain or vice versa. Assigning permission to users located from the other side of the forest.
You can see the trusts has been created
After Creation “ Click on Validate to verify the Trusts”
Enter the Target domain Credentials
Its always good to validate the trusts , as a confirmation , that we did the right thing
Now you can see the Trusts populated in the target domain
Two way transitive Trusts between domains is valid and active now.